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Update README.md

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Add upgrade details.

Signed-off-by: Sheng Yang <sheng.yang@rancher.com>
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Sheng Yang 2019-11-15 14:07:25 -08:00 committed by GitHub
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@ -39,7 +39,7 @@ Longhorn is 100% open source software. Project source code is spread across a nu
# Requirements
1. Docker v1.13+
2. Kubernetes v1.8+. Recommend v1.12+.
2. Kubernetes v1.14+.
3. `open-iscsi` has been installed on all the nodes of the Kubernetes cluster.
1. For GKE, recommended Ubuntu as guest OS image since it contains open-iscsi already.
2. For Debian/Ubuntu, use `apt-get install open-iscsi` to install.
@ -128,6 +128,8 @@ Noted that the UI is unauthenticated when you installed Longhorn using YAML file
# Upgrade
[See here](docs/upgrade.md) for details.
## Upgrade Longhorn manager
##### On Kubernetes clusters Managed by Rancher 2.1 or newer
@ -144,12 +146,7 @@ helm upgrade longhorn ./longhorn/chart
```
## Upgrade Longhorn engine
After upgraded manager, follow [the steps here](docs/upgrade.md#upgrade-longhorn-engine) to upgrade Longhorn engine for existing volumes.
1. Upgrade v0.5.0 to v0.6.0 requires offline upgrade. Live upgrade is not supported for this upgrade.
2. For non distruptive upgrade from previous version to v0.5.0, follow [the live upgrade steps here](./docs/upgrade.md#live-upgrade)
For more details about upgrade in Longhorn or upgrade from older versions, [see here](docs/upgrade.md).
After Longhorn Manager was upgraded, Longhorn Engine also need to be upgraded using Longhorn UI. [See here](docs/upgrade.md) for details.
# Create Longhorn Volumes